Hoisting machinery



(No Model.)

4 H. J. MOKEOWN.

. HOISTING MACHINERY.

Np. 488,447. Patented Dec. 20, 1892.

m: roams Prrms co. momm'nou WASHINGTON n c HUGH JAMES MOKEOWN, OFNEWPORT, KENTUCKY.

HOISTIN G MACHINERY.

SPECIFICATION forming part of Letters Patent No. 488,447, dated December20-, 1892.

Application filed April 20, 1892. Serial No. 429.935. (N0 model.)

To-a/ZZ whom it may concern:

Beitknown thatI, HUGH JAMES MOKEOWN, a citizen of the United States,residing at Newport, in the county of Campbell and State of Kentucky,have invented a new and useful Improvement in Hoisting Machinery,ofwhich the following is a specification, reference being had to theaccompanying drawings.

My invention relates to improvements in that class of machinery used forhoisting purposes, which employs a loose drum and a friction clutch, andconsists in a device for the better control of the winding drum, whileraising or lowering the object to be moved, the objects of myimprovement being to provide an easier and more effective connection forpositively moving the drum in andout of contactwith the friction wheelby a single lever. It has been found that where springs are employed tokeep the drum normally out of contact with the friction wheel, as thefriction wheel wears an increasing force is required to keep the drum incontact with it. On my improvement no springs are employed, but the drumis moved positively in both directions.

In the drawingsz-Figure l is a longitudinal central section of ahoisting apparatus embodying my invention. Fig. 2 is an enlarged detailsection through the line 0c-ac of Fig. 1. Fig. 3 is an enlarged detailplan of one of the drum-adjusting collars.

Similar letters of reference are used to indicate identical parts in allthe figures.

The winding drum A revolves loosely upon the shaft B, journaled upon theframe 0. A gear wheel D, keyed to the shaft B, has bolted to its innerface the friction blocks or clutch E. A pinion G meshing with the gearwheel D is secured upon the shaft F also journaled upon the frame 0 andcarrying upon each end driving wheels for connection with the neces sarymotive power.

Passing through the bracket J, secured to the frame 0, isa threadedshaft K to the outer end of which is fasten ed the operating handle orlever L, while its inner end forms ayoke M.

The shaft B is bored out sufficiently to receive a shaft II which isfitted to move longitudinally therein and this shaft H is also bored outand forms a sleeve for the reception of a loose pin I. The outen end ofshaft H is threaded and held withi n the yoke M by the nut e and washer6. Within the yoke M a short abutting pin 1' is rigidly fastened, so asto receive the impact of the loose pin I. To prevent the nut e frombeing turned off the end of the shaftlI by the washer e when the shaftis revolving,I provide a lugf upon the inner circumference of the washerwhich fits into a corresponding groove upon the shaft H as shown in Fig.2.

Upon both sides of the bearing 1) of the drum A are collars a, a',havinglugs d between which are secured the gibs 0,0 passing through slots inthe shafts B and H.

In order to secure as great a friction as possible, the friction blocksor clutch E secured to the gear wheel D are made tapering or conical andfit within a corresponding recess in the end of the drum A. I find inpractice that this construction gives better results with its doublesurface than where only one surface is used.

In the operation of my invention, the object to be raised is to befastened to a rope or chain which is carried around the drum A; thelever L is then moved sufficiently to cause the pin 1 to press the loosepin I against the gib c in the collar ctwhich in turn moves the drum Atoward and in contact with the friction blocks or clutch E secured uponthe face of the gear wheel D which receives its motion from the pinion Gupon the shaft F revolved by the necessary power through the drivingwheels upon either end. When it is desired to lower the object thusraised, a slight reverse movement of the lever L is made and the yoke Mpulling against washer e and nut 6 causes the shaft H to move outwardand against the gib c forcing the collar to against the bearing 1) ofthe drum A thus taking the latter from contact with the friction blocksE. It will be seen that the revolutions of the drum are fast or slow asthe operator may desire according to the force with which the drum isheld against the friction wheel E.

Having thus described my invention, the following is what I claim as newtherein,and desire to secure by Letters Patentz- 1. In combination withthe shaftB bored at one end, a lifting drum loosely mounted upon thesaid shaft, the shaft H inserted in the bore of said shaft B, collars a,a on the shaft B mounted upon opposite sides of the bearing of thelifting drum, and gibs c, 0' connecting the respective collars a, a tothe shaft I-I, all substantially as and for the purpose set forth.

2. In combination with the shaft B, a lifting drum loosely mounted uponsaid shaft, collars a, a mounted upon the shaftB on opposite sidesof thedrum,and having gibs 0,0 secured between lugs upon said collars andshaft H within the shaft B; said shaftsBand H having slots through whichgibs c and 0' pass, substantially as described.

3. In combination with the shaft B, bored at one end, a lifting drum,the shaft H, longitudinally movable in the bore of shaft B, collars a, amounted upon shaft B. on opposite sides of the drum and carrying gibs c,c which pass through shafts B, H the loose pin I inserted in the shaftH, and means for adjusting the pin I and shaft H against the gibs c andc substantially as described.

4. In a hoisting apparatus the combination with shaft 13, drum A andshaft H controlling the movement of the drum on shaft B, of the threadedshaft K having atone end the yoke Msecured to and adapted to turn uponthe end of the shaft H, substantially as described.

5. In a hoisting apparatus the combination with the shaft B, drum A,loosely mounted on shaft B, and shaft H adapted to move the drum onshaft B, of the shaftK threaded into the frame, and connected to one endof shaft H by means of the yoke M, the nut e, and washer e substantiallyas described.

6. In a hoisting apparatus, the combination With the shaftB, anddrumAmounted to turn thereon; of the shaft H having positive c0nnectionwith the drum for moving it in one direction, a pin having positiveconnection with drum A for moving it in the opposite di- 4o rection, thethreaded shaft K connected to shaft H by yoke M, and pin 2' rigidlysecured to said yoke, and adapted to press against the pm I,substantially as and for the purpose set forth.

7. In a hoisting machine, the combination of a main shaft havingconnections for receiving motion from a source of power, a friction headfixed to the main shaft, a winding drum loosely mounted on the mainshaft and adapted for frictional engagement with the friction head, apair of collars on opposite sides of the drum, a shaft within the mainshaft,a pair of gibs carried by the respective collars and passingthrough slots formed in the main and innor shafts to receive said gibs,a pin within the inner shaft bearing against one of the gibs, and acontrolling shaft screw threaded into the frame of the machine andhaving swivel connection with the inner shaft and bearing against thepin, whereby, movement of the controlling shaft out or in, communicatesmotion to the winding drum, through the inner shaft or the pin, allsubstantially as set forth.

The foregoing specification of my invention signed by me this 26th dayof March, A. D. 1892.

HUGH JAMES MCKEOVVN.

WVitnesses:

J EPTHA GARRARD, J. B. BECKER.

